3x+5y=8 5x+3y=8

(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai 3x-2y=9 x-3y=2 x+y=5 x+2y=3 y=x 2x+y=8 已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) (7y-3x)-(8y-5x)= 已知x-2y=2016,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以8x的值 已知x-2y=2012,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]/(8x)) 已知x-2y=2012,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷8x的值 方程组x-2y=8,3x-4y=5,x=?,y=? 求x:y:z x:y=7/5:7/3,y:x=7:8 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 3X+2Y=5X+2 2(3X+2Y)=2X+8 求 X Y